TOYOTA PREVIA 91-97 REPAIR MANUAL

DIAGNOSTIC

CODES

(Cont'd)

CodeNo.

•5 27 3, 32 41 «

Number

of

blinks"CHECK"ing light

.JMJL___nnnjm—RIiniUL_™

,„„ 52 53 •5 71 51

REMAR*1;

-0

•o

•2:

-0

noign

JITJUTJTL-

•1

"CHECK"

System

Engine

Diagnosis

WarningLight

Sub-

is

0.45

V or

more (rich)

and

output

of

Oxygen

n

..

sub-oxygen

sensor

is

0.45

V or

leas

Sensor

QN

(lean).

(0X2)

•6 (2

trip

detection

logic)

(1)

and (2)

Meter

ON • O

Vf

'

S'9nal

• 
  

Short

—

VC-E2.

..r

F|

Open

or

short

detected

continuously

for 0.5

c- i

!

Open

— E2

Sl9nal

;

• 
  

Short

-VS-VC

Sensor

ON

sensor

signal

(VTA)

for 0.5

sec.

or more.

SignalVehicle

i SPD

signal

is not

>ncut

to the ECU for at

least

Speed

i

(.--.

3

seconds

during high

load

driving with

Sensor

engine

speed

between

2,000

rpm

and

5.000

Signal

,

rpm.

Si^al

1 "!

OFF

!

once

until

en

9'

ne re

aches

SDO

fP

m or

more

Sensor

ON

5,200

rpm

signal

from

knock

sensor

is not

Signal

'

i

input

to ECU for 2

crank

revolution.

(KNK;

Trouble

Area

• 0 p

en°

or Yh'ort^n

5 suh-oxygen

• ECU • ECU• Open

or

shon

in

vehicle

• Vehicle

speed sensor

• ECU• Open

or

short

in

starter

• Open

or

short

in

'G

SW or

• ECU

(looseness,

etc.)

• ECU

Knock

i

With

engine speed between

550 rpm and

5,600]

T^iTlUirJl-

Control

I

ON

rpm,

the

engine

control

computer (for knock

• ECU

\l control)

malfunction

is

detected.

iiim^Ji_jwnnn_ii_

EGR

'

more.

50

sees,

from

start

of EGR

operation

System

QN

The

EGR

gas

temp.

,s less

than

70°C

;158°F)

function

'

<5

aF) during

the 50

sees.

Switch

Displayed

when

IDL

contact

OFF or

shift

Signal

',

check

terminals

El

andTET

connected.

• Open

in VSV

circuit

for EGR

• EGR

vacuum

hose

• Clogged

EGR gas

passage

• ECU• Thronle

position

sensor

IDL

• Accelerator

pedal,

cable

• ECU

*2

Memory

C, n O c 0 c X 0 X

<S:F"

indicates that

the

"CHECK'

does

not

light

up

during malfunction

diagnosis,

even

if a

malfunction

is

detected.

:ted.

tic C0(j

e is not

recorded

in the ECU

memory

even

if a

malfunction

occurs. According

y,

output

of

diagnostic

results

is

performed

with

the

ton

Switch

IG SW ON.

*5;

Code

26, 27, 71

is

used only

for

California

specifications.

"6:

"2

tr

p detection

logic"

Fig.

108

Engine

diagnostic

codes—

2TZ-FE

engine

continued

models.

9091

4G99

DIAGNOSTIC CODES

Light Pattern

Diagnosis

System

Normal

42 61 62

Defective

No. 1

speed

sensor

(in

combination meter)

severed

wire harness

or

short circuit

JUUUULJLJ1WL

Defective

No. 2

speed

sensor

{in

ATM}

• 
  

severed

ire

harness

or

short circuit

: Severed

No. 1

solenoid

or

short circuit

• 
  

j severed

wire harness

or

short circuit

Severed

No. 2

solenoid

or

short circuit

• 
  

severed

wire

harness

or

short circuit

Jl^JML

Severed

lock-up solenoid

or

short

circuit

• 
  

severed

wire

harness

or

short circuit

HINT:

If

codes

62, 63 or 64

appear,

there

is an

electri-

cal

malfunction

in the

solenoid.

Causes

due to

mechanical

failure,

such

as a

stuck

valve,

will

not

appear.

Fig.

109

Automatic

transmission

diagnostic

codes—2TZ-FE

engine

CDID DO GOGO